Liquid propane line filter



FIG. 1 is a perspective view taken from the top, front and left side ofa liquid propane line filter showing my new design;

FIG. 2 is a perspective view taken from the bottom, front and right sidethereof;

FIG. 3 is a perspective view taken from the bottom, rear and left sidethereof; and

FIG. 4 is a perspective view taken from the top, rear and right sidethereof.

The ornamental design for a liquid propane line filter, as shown.